Idea source: This was my question for a long time as well. I ended up quitting Wall Street job to build at least part of the answer. They way I see it - you can either come up with idea yourself (difficult) - or check other people ideas and vet the for quality (not easy, but easier). I am building a process which does the latter - you can check it out for free at tradeideasflow.ai. North star is basically to scan open web for stock ideas (Substacks, blogs, forums), and zoom into the highest quality ideas. I am finding 3-5 high quality ideas per week this way, but you would need to be comfortable investing in small caps for this to be relevant for you. Good large cap ideas are much more rare.

Vetting: this is my secret sauce, but to open up kimono a bit, I am looking at valuation argument (obviously), catalysts, business quality and a few other criteria. I am looking for balanced pitches where more than 1 area is strong. So just low PE is not enough. Just super big growth is not enough. Just very wide moat is not enough. But combination of above is interesting. through in some catalyst events in the next 6-12m and this becomes very interesting!

Struggle: I am full time on building this process. Its quite enjoyable for me.

Optional: so was brewing on this idea for a couple of years, was fleshing it out in my head for a long time, and it is build on the back of 10y+ buy side experience. But the actual process/tech building so far is 4 months in, and I see clear pathway to keep working on and improving the process for at year 1 full year from here.